I'm thinking about submitting this to their site, but this looks like a potential candidate for a printable gun:
http://heizerfirearms.com/ ...
Kinda cool, but the price... wow. I am going to also have to be able to print money.
something many have not thought about....3d printers......counterfeiting
can't print bitcoins

Why would you need a
3D printer for a flat paper bill?
dollars have a thing called security strip inside
And? Bill counterfeiting is a reality, and they use 2D printers. 3D printed bills with today's technology wouldn't fool anyone, you just can't get that much detail. 3D printing doesn't help with security strips at all.